File: Alpha12ALargeVentedBassGuitarCab.bb6
Alpha12A Large Vented FR or Bass Guitar Cab
By Jerry McNutt, Eminence Speaker LLC
50 Watts Displacement Limit; F3 of 51 Hz.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters--
Vb = 3.8 cu.ft
V(total) = 3.883 cu.ft
Fb = 62.88 Hz
QL = 7
F3 = 50.77 Hz
Fill = minimal
--Vents--
No. of Vents = 1
Vent shape = round
Vent ends = one flush
Dv = 7.508 in
Lv = 0.75 in
Driver Properties
--Description--
Name: Alpha-12
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: Revised OCT 2005
Piston: Paper cone.
Suspension: Cloth surround.
Dust Cap: Solid paper dust cap.
Frame: Pressed steel basket.
Voice Coil: 1.5 inch (38.1 mm) copper.
Magnet: 20 oz ferrite magnet.
--Configuration--
No. of Drivers = 1
--Driver Parameters--
Fs = 49 Hz
Qms = 6.53
Vas = 121.5 liters
Xmax = 2.4 mm
Sd = 519.5 sq.cm
Qes = 0.88
Re = 6.3 ohms
Le = 0.79 mH
Z = 8 ohms
Pe = 150 watts
Normalized Amplitude Response (dB-SPL/Hz)
Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 50 watts
Eminence Designer
dB
118
112
106
100
94
88
82
76
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Maximum Acoustic Power (dB-SPL/Hz at 1 m)
Eminence Designer
dB
122
116
110
104
98
92
86
80
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- Alpha12ALargeVentedBassGuitarCab.bb6
Cone Displacement ( mm/Hz) with 50 watts
Eminence Designer
mm
16
14
12
10
8
6
4
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Vent Air Velocity ( m/sec/Hz) with 50 watts
Eminence Designer
m/s
48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
System Impedance (ohms/Hz)
Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: Alpha12AMedVentedEnclosure.bb6
Alpha12A Med Vented, High Pwr Sat or Low Pwr FR Use
By Jerry McNutt, Eminence Speaker LLC
High Power Sat: 150 Watt Thermal Limit, use steep High Pass Filter 150 Hz or above.
Low Power Full Range use: 60 Watts Displacement Limit.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters--
Vb = 2 cu.ft
V(total) = 2.075 cu.ft
Fb = 75 Hz
QL = 7
F3 = 66.36 Hz
Fill = minimal
--Vents--
No. of Vents = 1
Vent shape = round
Vent ends = one flush
Dv = 5.774 in
Lv = 0.75 in
Driver Properties
--Description--
Name: Alpha-12
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: Revised OCT 2005
Piston: Paper cone.
Suspension: Cloth surround.
Dust Cap: Solid paper dust cap.
Frame: Pressed steel basket.
Voice Coil: 1.5 inch (38.1 mm) copper.
Magnet: 20 oz ferrite magnet.
--Configuration--
No. of Drivers = 1
--Driver Parameters--
Fs = 49 Hz
Qms = 6.53
Vas = 121.5 liters
Xmax = 2.4 mm
Sd = 519.5 sq.cm
Qes = 0.88
Re = 6.3 ohms
Le = 0.79 mH
Z = 8 ohms
Pe = 150 watts
Normalized Amplitude Response (dB-SPL/Hz)
Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 150 watts
Eminence Designer
dB
123
117
111
105
99
93
87
81
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Maximum Acoustic Power (dB-SPL/Hz at 1 m)
Eminence Designer
dB
122
116
110
104
98
92
86
80
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- Alpha12AMedVentedEnclosure.bb6
Cone Displacement ( mm/Hz) with 150 watts
Eminence Designer
mm
16
14
12
10
8
6
4
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Vent Air Velocity ( m/sec/Hz) with 150 watts
Eminence Designer
m/s
48
42
36
30
24
18
12
6
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
System Impedance (ohms/Hz)
Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
File: Alpha12ASmallSealedMidHighOrFloorMon.bb6
Alpha12A Small Sealed Mid/High or Floor Monitor
By Jerry McNutt, Eminence Speaker LLC
150 Watt Thermal Limit; Use with a steep High Pass Filter set to 150 Hz or higher.
Box Properties
--Description--
Name:
Type: Closed Box
Shape: Prism, square
--Box Parameters--
Vb = 0.496 cu.ft
V(total) = 0.559 cu.ft
Qtc = 1.422
QL = 20
F3 = 100.2 Hz
Fill = heavy
Driver Properties
--Description--
Name: Alpha-12
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: Revised OCT 2005
Piston: Paper cone.
Suspension: Cloth surround.
Dust Cap: Solid paper dust cap.
Frame: Pressed steel basket.
Voice Coil: 1.5 inch (38.1 mm) copper.
Magnet: 20 oz ferrite magnet.
--Configuration--
No. of Drivers = 1
--Driver Parameters--
Fs = 49 Hz
Qms = 6.53
Vas = 121.5 liters
Xmax = 2.4 mm
Sd = 519.5 sq.cm
Qes = 0.88
Re = 6.3 ohms
Le = 0.79 mH
Z = 8 ohms
Pe = 150 watts
Normalized Amplitude Response (dB-SPL/Hz)
Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 150 watts
Eminence Designer
dB
123
117
111
105
99
93
87
81
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Maximum Acoustic Power (dB-SPL/Hz at 1 m)
Eminence Designer
dB
122
116
110
104
98
92
86
80
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Page Two -- Alpha12ASmallSealedMidHighOrFloorMon.bb6
Cone Displacement ( mm/Hz) with 150 watts
Eminence Designer
mm
16
14
12
10
8
6
4
2
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
System Impedance (ohms/Hz)
Eminence Designer
ohms
80
70
60
50
40
30
20
10
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
